459 lines
17 KiB
C
459 lines
17 KiB
C
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <limits.h>
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#include <linux/input.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/reboot.h>
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#include <sys/types.h>
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#include <time.h>
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#include <unistd.h>
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#include "bootloader.h"
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#include "common.h"
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#include "cutils/properties.h"
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#include "firmware.h"
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#include "install.h"
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#include "minui/minui.h"
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#include "minzip/DirUtil.h"
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#include "roots.h"
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static const struct option OPTIONS[] = {
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{ "send_intent", required_argument, NULL, 's' },
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{ "update_package", required_argument, NULL, 'u' },
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{ "wipe_data", no_argument, NULL, 'w' },
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{ "wipe_cache", no_argument, NULL, 'c' },
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};
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static const char *COMMAND_FILE = "CACHE:recovery/command";
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static const char *INTENT_FILE = "CACHE:recovery/intent";
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static const char *LOG_FILE = "CACHE:recovery/log";
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static const char *SDCARD_PACKAGE_FILE = "SDCARD:update.zip";
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static const char *TEMPORARY_LOG_FILE = "/tmp/recovery.log";
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/*
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* The recovery tool communicates with the main system through /cache files.
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* /cache/recovery/command - INPUT - command line for tool, one arg per line
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* /cache/recovery/log - OUTPUT - combined log file from recovery run(s)
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* /cache/recovery/intent - OUTPUT - intent that was passed in
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*
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* The arguments which may be supplied in the recovery.command file:
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* --send_intent=anystring - write the text out to recovery.intent
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* --update_package=root:path - verify install an OTA package file
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* --wipe_data - erase user data (and cache), then reboot
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* --wipe_cache - wipe cache (but not user data), then reboot
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*
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* After completing, we remove /cache/recovery/command and reboot.
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* Arguments may also be supplied in the bootloader control block (BCB).
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* These important scenarios must be safely restartable at any point:
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*
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* FACTORY RESET
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* 1. user selects "factory reset"
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* 2. main system writes "--wipe_data" to /cache/recovery/command
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* 3. main system reboots into recovery
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* 4. get_args() writes BCB with "boot-recovery" and "--wipe_data"
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* -- after this, rebooting will restart the erase --
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* 5. erase_root() reformats /data
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* 6. erase_root() reformats /cache
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* 7. finish_recovery() erases BCB
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* -- after this, rebooting will restart the main system --
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* 8. main() calls reboot() to boot main system
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*
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* OTA INSTALL
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* 1. main system downloads OTA package to /cache/some-filename.zip
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* 2. main system writes "--update_package=CACHE:some-filename.zip"
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* 3. main system reboots into recovery
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* 4. get_args() writes BCB with "boot-recovery" and "--update_package=..."
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* -- after this, rebooting will attempt to reinstall the update --
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* 5. install_package() attempts to install the update
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* NOTE: the package install must itself be restartable from any point
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* 6. finish_recovery() erases BCB
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* -- after this, rebooting will (try to) restart the main system --
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* 7. ** if install failed **
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* 7a. prompt_and_wait() shows an error icon and waits for the user
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* 7b; the user reboots (pulling the battery, etc) into the main system
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* 8. main() calls maybe_install_firmware_update()
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* ** if the update contained radio/hboot firmware **:
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* 8a. m_i_f_u() writes BCB with "boot-recovery" and "--wipe_cache"
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* -- after this, rebooting will reformat cache & restart main system --
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* 8b. m_i_f_u() writes firmware image into raw cache partition
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* 8c. m_i_f_u() writes BCB with "update-radio/hboot" and "--wipe_cache"
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* -- after this, rebooting will attempt to reinstall firmware --
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* 8d. bootloader tries to flash firmware
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* 8e. bootloader writes BCB with "boot-recovery" (keeping "--wipe_cache")
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* -- after this, rebooting will reformat cache & restart main system --
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* 8f. erase_root() reformats /cache
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* 8g. finish_recovery() erases BCB
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* -- after this, rebooting will (try to) restart the main system --
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* 9. main() calls reboot() to boot main system
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*/
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static const int MAX_ARG_LENGTH = 4096;
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static const int MAX_ARGS = 100;
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// open a file given in root:path format, mounting partitions as necessary
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static FILE*
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fopen_root_path(const char *root_path, const char *mode) {
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if (ensure_root_path_mounted(root_path) != 0) {
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LOGE("Can't mount %s\n", root_path);
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return NULL;
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}
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char path[PATH_MAX] = "";
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if (translate_root_path(root_path, path, sizeof(path)) == NULL) {
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LOGE("Bad path %s\n", root_path);
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return NULL;
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}
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// When writing, try to create the containing directory, if necessary.
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// Use generous permissions, the system (init.rc) will reset them.
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if (strchr("wa", mode[0])) dirCreateHierarchy(path, 0777, NULL, 1);
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FILE *fp = fopen(path, mode);
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return fp;
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}
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// close a file, log an error if the error indicator is set
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static void
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check_and_fclose(FILE *fp, const char *name) {
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fflush(fp);
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if (ferror(fp)) LOGE("Error in %s\n(%s)\n", name, strerror(errno));
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fclose(fp);
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}
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// command line args come from, in decreasing precedence:
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// - the actual command line
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// - the bootloader control block (one per line, after "recovery")
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// - the contents of COMMAND_FILE (one per line)
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static void
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get_args(int *argc, char ***argv) {
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struct bootloader_message boot;
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memset(&boot, 0, sizeof(boot));
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get_bootloader_message(&boot); // this may fail, leaving a zeroed structure
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if (boot.command[0] != 0 && boot.command[0] != 255) {
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LOGI("Boot command: %.*s\n", sizeof(boot.command), boot.command);
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}
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if (boot.status[0] != 0 && boot.status[0] != 255) {
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LOGI("Boot status: %.*s\n", sizeof(boot.status), boot.status);
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}
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// --- if arguments weren't supplied, look in the bootloader control block
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if (*argc <= 1) {
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boot.recovery[sizeof(boot.recovery) - 1] = '\0'; // Ensure termination
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const char *arg = strtok(boot.recovery, "\n");
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if (arg != NULL && !strcmp(arg, "recovery")) {
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*argv = (char **) malloc(sizeof(char *) * MAX_ARGS);
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(*argv)[0] = strdup(arg);
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for (*argc = 1; *argc < MAX_ARGS; ++*argc) {
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if ((arg = strtok(NULL, "\n")) == NULL) break;
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(*argv)[*argc] = strdup(arg);
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}
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LOGI("Got arguments from boot message\n");
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} else if (boot.recovery[0] != 0 && boot.recovery[0] != 255) {
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LOGE("Bad boot message\n\"%.20s\"\n", boot.recovery);
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}
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}
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// --- if that doesn't work, try the command file
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if (*argc <= 1) {
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FILE *fp = fopen_root_path(COMMAND_FILE, "r");
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if (fp != NULL) {
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char *argv0 = (*argv)[0];
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*argv = (char **) malloc(sizeof(char *) * MAX_ARGS);
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(*argv)[0] = argv0; // use the same program name
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char buf[MAX_ARG_LENGTH];
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for (*argc = 1; *argc < MAX_ARGS; ++*argc) {
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if (!fgets(buf, sizeof(buf), fp)) break;
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(*argv)[*argc] = strdup(strtok(buf, "\r\n")); // Strip newline.
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}
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check_and_fclose(fp, COMMAND_FILE);
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LOGI("Got arguments from %s\n", COMMAND_FILE);
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}
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}
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// --> write the arguments we have back into the bootloader control block
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// always boot into recovery after this (until finish_recovery() is called)
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strlcpy(boot.command, "boot-recovery", sizeof(boot.command));
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strlcpy(boot.recovery, "recovery\n", sizeof(boot.recovery));
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int i;
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for (i = 1; i < *argc; ++i) {
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strlcat(boot.recovery, (*argv)[i], sizeof(boot.recovery));
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strlcat(boot.recovery, "\n", sizeof(boot.recovery));
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}
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set_bootloader_message(&boot);
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}
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// clear the recovery command and prepare to boot a (hopefully working) system,
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// copy our log file to cache as well (for the system to read), and
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// record any intent we were asked to communicate back to the system.
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// this function is idempotent: call it as many times as you like.
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static void
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finish_recovery(const char *send_intent)
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{
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// By this point, we're ready to return to the main system...
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if (send_intent != NULL) {
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FILE *fp = fopen_root_path(INTENT_FILE, "w");
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if (fp == NULL) {
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LOGE("Can't open %s\n", INTENT_FILE);
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} else {
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fputs(send_intent, fp);
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check_and_fclose(fp, INTENT_FILE);
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}
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}
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// Copy logs to cache so the system can find out what happened.
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FILE *log = fopen_root_path(LOG_FILE, "a");
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if (log == NULL) {
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LOGE("Can't open %s\n", LOG_FILE);
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} else {
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FILE *tmplog = fopen(TEMPORARY_LOG_FILE, "r");
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if (tmplog == NULL) {
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LOGE("Can't open %s\n", TEMPORARY_LOG_FILE);
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} else {
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static long tmplog_offset = 0;
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fseek(tmplog, tmplog_offset, SEEK_SET); // Since last write
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char buf[4096];
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while (fgets(buf, sizeof(buf), tmplog)) fputs(buf, log);
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tmplog_offset = ftell(tmplog);
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check_and_fclose(tmplog, TEMPORARY_LOG_FILE);
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}
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check_and_fclose(log, LOG_FILE);
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}
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// Reset the bootloader message to revert to a normal main system boot.
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struct bootloader_message boot;
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memset(&boot, 0, sizeof(boot));
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set_bootloader_message(&boot);
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// Remove the command file, so recovery won't repeat indefinitely.
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char path[PATH_MAX] = "";
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if (ensure_root_path_mounted(COMMAND_FILE) != 0 ||
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translate_root_path(COMMAND_FILE, path, sizeof(path)) == NULL ||
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(unlink(path) && errno != ENOENT)) {
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LOGW("Can't unlink %s\n", COMMAND_FILE);
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}
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sync(); // For good measure.
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}
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static int
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erase_root(const char *root)
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{
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ui_set_background(BACKGROUND_ICON_INSTALLING);
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ui_show_indeterminate_progress();
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ui_print("Formatting %s...\n", root);
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return format_root_device(root);
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}
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static void
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prompt_and_wait()
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{
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char* headers[] = { "Android system recovery <"
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EXPAND(RECOVERY_API_VERSION) "e>",
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"",
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"Use trackball to highlight;",
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"click to select.",
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"",
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NULL };
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// these constants correspond to elements of the items[] list.
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#define ITEM_REBOOT 0
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#define ITEM_APPLY_SDCARD 1
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#define ITEM_WIPE_DATA 2
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#define ITEM_WIPE_CACHE 3
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char* items[] = { "reboot system now [Home+Back]",
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"apply sdcard:update.zip [Alt+S]",
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"wipe data/factory reset [Alt+W]",
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"wipe cache partition",
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NULL };
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ui_start_menu(headers, items);
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int selected = 0;
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int chosen_item = -1;
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finish_recovery(NULL);
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ui_reset_progress();
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for (;;) {
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int key = ui_wait_key();
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int alt = ui_key_pressed(KEY_LEFTALT) || ui_key_pressed(KEY_RIGHTALT);
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int visible = ui_text_visible();
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if (key == KEY_DREAM_BACK && ui_key_pressed(KEY_DREAM_HOME)) {
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// Wait for the keys to be released, to avoid triggering
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// special boot modes (like coming back into recovery!).
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while (ui_key_pressed(KEY_DREAM_BACK) ||
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ui_key_pressed(KEY_DREAM_HOME)) {
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usleep(1000);
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}
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chosen_item = ITEM_REBOOT;
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} else if (alt && key == KEY_W) {
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chosen_item = ITEM_WIPE_DATA;
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} else if (alt && key == KEY_S) {
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chosen_item = ITEM_APPLY_SDCARD;
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} else if ((key == KEY_DOWN || key == KEY_VOLUMEDOWN) && visible) {
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++selected;
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selected = ui_menu_select(selected);
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} else if ((key == KEY_UP || key == KEY_VOLUMEUP) && visible) {
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--selected;
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selected = ui_menu_select(selected);
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} else if (key == BTN_MOUSE && visible) {
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chosen_item = selected;
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}
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if (chosen_item >= 0) {
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// turn off the menu, letting ui_print() to scroll output
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// on the screen.
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ui_end_menu();
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switch (chosen_item) {
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case ITEM_REBOOT:
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return;
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case ITEM_WIPE_DATA:
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ui_print("\n-- Wiping data...\n");
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erase_root("DATA:");
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erase_root("CACHE:");
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ui_print("Data wipe complete.\n");
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if (!ui_text_visible()) return;
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break;
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case ITEM_WIPE_CACHE:
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ui_print("\n-- Wiping cache...\n");
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erase_root("CACHE:");
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ui_print("Cache wipe complete.\n");
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if (!ui_text_visible()) return;
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break;
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case ITEM_APPLY_SDCARD:
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ui_print("\n-- Install from sdcard...\n");
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int status = install_package(SDCARD_PACKAGE_FILE);
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if (status != INSTALL_SUCCESS) {
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ui_set_background(BACKGROUND_ICON_ERROR);
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ui_print("Installation aborted.\n");
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} else if (!ui_text_visible()) {
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return; // reboot if logs aren't visible
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} else {
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if (firmware_update_pending()) {
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ui_print("\nReboot via home+back or menu\n"
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"to complete installation.\n");
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} else {
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ui_print("\nInstall from sdcard complete.\n");
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}
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}
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break;
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}
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// if we didn't return from this function to reboot, show
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// the menu again.
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ui_start_menu(headers, items);
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selected = 0;
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chosen_item = -1;
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finish_recovery(NULL);
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ui_reset_progress();
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// throw away keys pressed while the command was running,
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// so user doesn't accidentally trigger menu items.
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ui_clear_key_queue();
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}
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}
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}
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static void
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print_property(const char *key, const char *name, void *cookie)
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{
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fprintf(stderr, "%s=%s\n", key, name);
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}
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int
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main(int argc, char **argv)
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{
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time_t start = time(NULL);
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// If these fail, there's not really anywhere to complain...
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freopen(TEMPORARY_LOG_FILE, "a", stdout); setbuf(stdout, NULL);
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freopen(TEMPORARY_LOG_FILE, "a", stderr); setbuf(stderr, NULL);
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fprintf(stderr, "Starting recovery on %s", ctime(&start));
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ui_init();
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get_args(&argc, &argv);
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int previous_runs = 0;
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const char *send_intent = NULL;
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const char *update_package = NULL;
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int wipe_data = 0, wipe_cache = 0;
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int arg;
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while ((arg = getopt_long(argc, argv, "", OPTIONS, NULL)) != -1) {
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switch (arg) {
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case 'p': previous_runs = atoi(optarg); break;
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case 's': send_intent = optarg; break;
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case 'u': update_package = optarg; break;
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case 'w': wipe_data = wipe_cache = 1; break;
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case 'c': wipe_cache = 1; break;
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case '?':
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LOGE("Invalid command argument\n");
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continue;
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}
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}
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fprintf(stderr, "Command:");
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for (arg = 0; arg < argc; arg++) {
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fprintf(stderr, " \"%s\"", argv[arg]);
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}
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fprintf(stderr, "\n\n");
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property_list(print_property, NULL);
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fprintf(stderr, "\n");
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int status = INSTALL_SUCCESS;
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if (update_package != NULL) {
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status = install_package(update_package);
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if (status != INSTALL_SUCCESS) ui_print("Installation aborted.\n");
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} else if (wipe_data || wipe_cache) {
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if (wipe_data && erase_root("DATA:")) status = INSTALL_ERROR;
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if (wipe_cache && erase_root("CACHE:")) status = INSTALL_ERROR;
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if (status != INSTALL_SUCCESS) ui_print("Data wipe failed.\n");
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} else {
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status = INSTALL_ERROR; // No command specified
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}
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if (status != INSTALL_SUCCESS) ui_set_background(BACKGROUND_ICON_ERROR);
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if (status != INSTALL_SUCCESS || ui_text_visible()) prompt_and_wait();
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// If there is a radio image pending, reboot now to install it.
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maybe_install_firmware_update(send_intent);
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// Otherwise, get ready to boot the main system...
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finish_recovery(send_intent);
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ui_print("Rebooting...\n");
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sync();
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reboot(RB_AUTOBOOT);
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return EXIT_SUCCESS;
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}
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